Tube-extractor.



mwmm TUBE EXTRAGTOR. APPLICATION FILED 00T. 14,1910.

Patented Apr. 18, 1911.

THOMAS JEFFERSON BOROFF, OF DAYTON, OHIO.

TUBE-EXTRACTOR.

Specification of Letters Patent.

Patented Apr. 18, 1911.

Application filed October 14, 1910. Serial No. 587,032.

To all whom 'it may concern:

Be it known that I, THOMAS JEFFERSON Bonorr, a citizen of the UnitedStates, residing at Dayton, in the county of Montgomery and State ofOhio, have invented certain new and useful Improvements inn drivenwells.

The object of the invention is to provide a device of the above typethat'is simple in construction, effective and easy to manipulate, andwhich may readily'be extracted from the tube.

The novel and advantageous features will be set forth. in the followingspecification, and pointed out in the claim.

Referring to the accompanying drawings, Figure 1 is a side elevation ofthe device. Fig. 2 is a side elevation at a right angle to that shown inFig. 1. Fig. 3 is a view of the tool or implement placed in the tube orpipe, preparatory to extracting the tube or pipe. Fig. 4 is a section onthe line a-a of Fig. 3. And Fig. 5 is a section on the line b-b of Fig.1.

In the drawings and description similar reference characters indicatecorresponding parts.

In the said drawings, 1 represents the ground or well into which a tubeor pipe 2 has been driven, and whichv has been detached or broken off ata point 3 below the surface of the ground, and is inaccessible from thesurface of the ground. Under these conditions the tool or implement isutilized to extract'the tube or pipe 2 below the surface of the groundwithout excavating around the pipe to remove it. The pipe within theground may be removed by theV implement and another section or length ofpiping or tubing be attached thereto and reinserted to bring the end ofthe driven pipe above the surface of the ground.

The tool and its operation is described as follows: 4 and 5 designatetwo 'jaws or clamping members, the lower outer portions of which areprovided with upwardly pointing teeth 6 which are adapted to engage theinner adjacent sides of the pipe or tubing when the said members 4 and 5are expanded in the manner presently described. The said gaws orclamping members 4 and 5 are provided with apertured heads 7 throughwhich an operating rod 8 passes loosely and extends up in proximity tothe surface of the ground. Rigidly attached to the lower end of saidoperating rod 8 is a wedge or expanding head 9, the narrower portion ofwhich is uppermost. This wedge lies between the clamping members 4 and5, and is movable therebetween from the rod 8, said wedge being adaptedto expand the clamping members 4 and 5 against the inner sides of the.tube, as in Fig. 3, or to permit said clamping members to contract, asin Fig. l, for insertion in the pipe. It will be readily seen that theexpansion of said members occurs when the wedge is drawn upwardly andthe contraction of the members is permitted when the wedge is lowered.The operating rod may be of any length, or it may be made in sectionsprovided with a coupling member or union 9a, and on its upper end it isprovided with a suitable device which may be in the form of a hook 10for the connection of a chain or other member in case the pipe to beextracted is at a distance below the surface of the ground greater thanthe length of the tube.

To insert the tool in the pipe or tubing, the clamping members 4 and 5are set in an upper position, and in engagement with the upper portionof the wedge9; this places said clamping members in their contractedposition. The upper portions of said members, it will be observed, aretapered inwardly in order to allow them to be held in their contractedpositions by a ring 11, which drops loosely over said member untilarrested, as is shown in Fig. l. When the tool is inserted in the tube,this ring 11 frees the clamping members by engaging the top or upper endof the tube, and said niembers are thus released, allowing them to belowered into the tube and expanded by the wedge 9. It will be understoodthat the ring 11 is instrumental only in holding the clamping members ina position to enter the mouth of the tube. When inserting the toolwithin the tube or pipe to be removed, there is liability of the lowerends of the clampioo ing members 4 and 5 engaging the end of said tube,and to thus release said clamping members from engagement with the wedge9 and to thus allow the wedge to enter the pipe or tubing without them.In order to prevent this possibility, there is provided a iiange 12 onthe rod 8. Between this iange and the top of the clamping members, theremay be inserted one or more pins 13 which are instrumental in preventingsaid clamping members from moving upwardly should their lower endsengage the ends of the pipe or tubing. After said clamping members havebeen inserted in the tube, the wedge 9 is drawn upwardly by means of theoperating rod 8, and this operation expands the clamping members 4 and5, as before stated. Then the rod 8 is drawn up, the pins 13 drop fromtheir` positions, as the clamping jaws or members 4 and 5 are then underthe absolute control of the wedge 9. After the pipe or tubing has beenwithdrawn a sufficient extent, the tool is extracted by driving thewedge 9 downwardly by means of the rod 8. This releases the clampingmembers 4 and 5 from engagement with the tool. The rod 8 is then given aquarter turn, which places the shoulder 14 or upper end of the wedge,under the lower ends of the clamping mem bers 4 and 5. An upwardmovement of the operating rod S will then extract said clamping members,and the tool in its entirety.

It will be observed from F ig. 2, that the width of the wedge 9 isgreater in one direction than in the other. This is desirable in orderto provide a bearing surface for the clamping members, which issubstantially equal to the width of the clamping members. In order toprevent the clamping members 4 and 5 dropping by their own weight whenthe wedge 9 is lowered, there is provided a wire or suitable cord 16,which is attached to the apertured heads 7, and extends upwardly out ofthe well. When the wedge 9 is lowered, the said clamping members may bedrawn upwardly to allow the shoulder 14 to be placed under the lowerends of said clamping members.

I claim:

In a tube extractor, the combination with an expanding wedffe having anoperating rod extended thereiiom, said operatin rod having an annularenlargement at a suitable point above the wedge, of two clamping membershaving their outer surfaces tapered upwardly and serrated below saidtapered portion, said clamping members having their upper endsterminated in apertured heads through which the operating rod looselypasses, a clamping ring adapted to hold said clamping members in theircontracted position while the implement is being inserted in the tubingto be extracted, and means engaging the annular enlargement on theoperating rod and the upper end of the clamping members, to prevent saidclamping members from moving` upward when the implement. is beinginserted in the tubing.

In testimony whereof I affix my signature, in presence of two witnesses.

THOMAS JEFFERSON BOROFF.

Witnesses:

MINNIE BoRoFF, HOWARD S. SMITH.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. C.

